I tried to upgrade to Windows 8.1 yesterday. I got it successfully activated by calling MS and getting an activation code based on my Win 8 product key. However, the SteelSeries Mouse/KB software and drivers (SteelSeries Engine) completely bricks Windows 8.1 and SteelSeries has no intention of...
Try playing BF3 at 5760x1080 or higher (the people who should actually spend this kind of money on these cards) with everything maxed and see how much VRAM is used. Yeah.
This guy is running crossfire 7970s on 5 monitors (I think all of them are 120Hz too) in Eyefinity. He also does some tests on only 3 120hz monitors. He's a member of these forums so maybe you can contact him
It's 2012, multi-monitor is the way to go. It's really not that expensive, compared to what it used to be. After having Eyefinity for a while now, I would never go back to single monitor gaming...ever. You really do not notice the bezels at all